I had added the headers in the following way,

  getdataForFilters():Promise<IFilterResponse> {
     return this.httpClient.get<IFilterResponse>(this.url + '/filters', this.headers).toPromise();
  }

    Type 'HttpSentEvent' is missing the following properties from type  ....

Seems like after adding headers I am getting the error at interface. Should i also need to add header data in my interface? Can anyone please help.